Electronic device and method for transmission of reason wireless charging is stopping

ABSTRACT

An electronic device may include a display, a power reception circuit, and a processor. The processor may perform wireless charging by receiving power wirelessly from an external electronic device through the power reception circuit, and receive data on one or more reasons to stop wireless charging from the external electronic device during the wireless charging. Also, the processor may transmit acknowledge (ACK) data to the external electronic device in response to receiving the data on the one or more reasons to stop wireless charging, and display, through the display, at least one reason to stop wireless charging included in the data on the one or more reasons to stop wireless charging. Other embodiments are possible.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a Continuation of Ser. No. 16/246,726 filed on Jan.14, 2019 which is based on and claims priority under 35 U.S.C. § 119 toKorean Patent Application No. 10-2018-0005286, filed on Jan. 15, 2018,in the Korean Intellectual Property Office, the disclosure of which isincorporated by reference herein in its entirety.

BACKGROUND 1. Technical Field

The disclosure relates to an electronic device and method fortransmission of a reason for stopping wireless charging.

2. Description of Related Art

Recently, wireless charging techniques based on electromagneticinduction or magnetic resonance have been applied to electronic devicessuch as smart phones. When a power receiver (or a “PRX,” e.g., a smartphone) comes in contact with a power transmitter (or “PTX,” e.g., awireless charging pad) or is within a certain distance of the powertransmitter, the battery of the power receiver can be charged due to theelectromagnetic induction or magnetic resonance between the transmissioncoil of the power transmitter and the reception coil of the powerreceiver.

While wireless charging process is performed between the powertransmitter and the power receiver, the power transmitter may stoptransmitting the power to the power receiver, for example, due to somedisruptive event. In this case, conventionally the user does not knowwhy the wireless charging is stopped, or may be unaware that wirelesscharging has stopped. Therefore, the user may continue to place thepower receiver in contact with or near the power transmitter, under theimpression that the power receiver is being charged, and may bedisappointed after elapse of a specific time period to discover that thepower receiver was not being charged. Additionally, even when the useris aware that the power receiver is not charging, the lack of feedbackregarding why the power receiver is not charging may result in user'sdissatisfaction with the quality and usability of the wireless chargingfunction of the power receiver.

SUMMARY

According to an embodiment of the disclosure, an electronic device maycomprise a display; a power reception circuit; and a processorconfigured to perform wireless charging by receiving power wirelesslyfrom an external electronic device through the power reception circuit,receive data on one or more reasons to stop wireless charging from theexternal electronic device during the wireless charging, transmitacknowledge (ACK) data to the external electronic device in response toreceiving the data on the one or more reasons to stop wireless charging,and display, through the display, at least one reason to stop wirelesscharging stop reason included in the data on the one or more reasons tostop wireless charging.

According to an embodiment of the disclosure, a method performed by anelectronic device may comprise performing wireless charging by receivingpower wirelessly from an external electronic device through a powerreception circuit; receiving data on one or more reasons to stopwireless charging from the external electronic device during thewireless charging; transmitting acknowledge (ACK) data to the externalelectronic device in response to the receiving the data on the one ormore reasons to stop wireless charging; and displaying, through adisplay, at least one reason to stop wireless charging included in thedata on the one or more reasons to stop wireless charging.

According to an embodiment of the disclosure, an electronic device maycomprise a power transmission circuit; and a processor configured toperform wireless power transfer by transmitting power wirelessly to anexternal electronic device through the power transmission circuit,detect a reason to stop wireless charging during the wireless powertransfer, transmit data on the reason to stop wireless charging to theexternal electronic device, and stop the wireless power transfer afterelapse of a predetermined time period from the transmitting of the dataon the reason to stop wireless charging.

According to an embodiment of the disclosure, when a situation forstopping power transfer between a power transmitter and a power receiverarises during the wireless charging process, the power transmitter cantransmit a reason for stopping the charging to the power receiver and,after an elapse of a certain time period, stop the power transfer. Thisprovides helpful feedback to the user regarding the operations of thewireless charging process. In addition, by collecting various reasonswireless charging stopped, it is possible to improve the quality andusability of wireless charging between the power transmitter and thepower receiver.

Other aspects, advantages, and salient features of the disclosure willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses various embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of an embodimentof the disclosure of the present disclosure will be more apparent fromthe following description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a block diagram of an electronic device in a networkenvironment according to various embodiments of the present disclosure.

FIG. 2 is a block diagram illustrating a power management module and abattery of an electronic device according to an embodiment of thepresent disclosure.

FIG. 3 is a block diagram illustrating a wireless charging environmentaccording to an embodiment of the present disclosure.

FIG. 4 is a flow diagram illustrating a wireless charging process and awireless charging stop process between an electronic device and anexternal electronic device according to an embodiment of the presentdisclosure.

FIG. 5 is a diagram illustrating a data partition structure forindicating a reason for stopping wireless charging according to anembodiment of the present disclosure.

FIG. 6 is a diagram illustrating data representing a reason for stoppingwireless charging according to an embodiment of the present disclosure.

FIG. 7 is a diagram illustrating a method for outputting a reason tostop wireless charging of an electronic device according to anembodiment of the present disclosure.

FIG. 8 is a flow diagram illustrating a method for transmitting a reasonto stop charging and stopping power transfer at an external electronicdevice according to an embodiment of the present disclosure.

FIG. 9 is a flow diagram illustrating a method for receiving a reason tostop wireless charging and stopping wireless charging at an electronicdevice according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

FIG. 1 is a block diagram illustrating an electronic device 101 in anetwork environment 100 according to various embodiments. Referring toFIG. 1, the electronic device 101 in the network environment 100 maycommunicate with an electronic device 102 via a first network 198 (e.g.,a short-range wireless communication network), or an electronic device104 or a server 108 via a second network 199 (e.g., a long-rangewireless communication network). According to an embodiment, theelectronic device 101 may communicate with the electronic device 104 viathe server 108. According to an embodiment, the electronic device 101may include a processor 120, memory 130, an input device 150, a soundoutput device 155, a display device 160, an audio module 170, a sensormodule 176, an interface 177, a haptic module 179, a camera module 180,a power management module 188, a battery 189, a communication module190, a subscriber identification module (SIM) 196, or an antenna module197. In some embodiments, at least one (e.g., the display device 160 orthe camera module 180) of the components may be omitted from theelectronic device 101, or one or more other components may be added inthe electronic device 101. In some embodiments, some of the componentsmay be implemented as single integrated circuitry. For example, thesensor module 176 (e.g., a fingerprint sensor, an iris sensor, or anilluminance sensor) may be implemented as embedded in the display device160 (e.g., a display).

The processor 120 may execute, for example, software (e.g., a program140) to control at least one other component (e.g., a hardware orsoftware component) of the electronic device 101 coupled with theprocessor 120, and may perform various data processing or computation.According to one embodiment, as at least part of the data processing orcomputation, the processor 120 may load a command or data received fromanother component (e.g., the sensor module 176 or the communicationmodule 190) in volatile memory 132, process the command or the datastored in the volatile memory 132, and store resulting data innon-volatile memory 134. According to an embodiment, the processor 120may include a main processor 121 (e.g., a central processing unit (CPU)or an application processor (AP)), and an auxiliary processor 123 (e.g.,a graphics processing unit (GPU), an image signal processor (ISP), asensor hub processor, or a communication processor (CP)) that isoperable independently from, or in conjunction with, the main processor121. Additionally or alternatively, the auxiliary processor 123 may beadapted to consume less power than the main processor 121, or to bespecific to a specified function. The auxiliary processor 123 may beimplemented as separate from, or as part of the main processor 121.

The auxiliary processor 123 may control at least some of functions orstates related to at least one component (e.g., the display device 160,the sensor module 176, or the communication module 190) among thecomponents of the electronic device 101, instead of the main processor121 while the main processor 121 is in an inactive (e.g., sleep) state,or together with the main processor 121 while the main processor 121 isin an active state (e.g., executing an application). According to anembodiment, the auxiliary processor 123 (e.g., an image signal processoror a communication processor) may be implemented as part of anothercomponent (e.g., the camera module 180 or the communication module 190)functionally related to the auxiliary processor 123.

The memory 130 may store various data used by at least one component(e.g., the processor 120 or the sensor module 176) of the electronicdevice 101. The various data may include, for example, software (e.g.,the program 140) and input data or output data for a command relatedthereto. The memory 130 may include the volatile memory 132 or thenon-volatile memory 134.

The program 140 may be stored in the memory 130 as software, and mayinclude, for example, an operating system (OS) 142, middleware 144, oran application 146.

The input device 150 may receive a command or data to be used by othercomponent (e.g., the processor 120) of the electronic device 101, fromthe outside (e.g., a user) of the electronic device 101. The inputdevice 150 may include, for example, a microphone, a mouse, a keyboard,or a digital pen (e.g., a stylus pen).

The sound output device 155 may output sound signals to the outside ofthe electronic device 101. The sound output device 155 may include, forexample, a speaker or a receiver. The speaker may be used for generalpurposes, such as playing multimedia or playing record, and the receivermay be used for an incoming calls. According to an embodiment, thereceiver may be implemented as separate from, or as part of the speaker.

The display device 160 may visually provide information to the outside(e.g., a user) of the electronic device 101. The display device 160 mayinclude, for example, a display, a hologram device, or a projector andcontrol circuitry to control a corresponding one of the display,hologram device, and projector. According to an embodiment, the displaydevice 160 may include touch circuitry adapted to detect a touch, orsensor circuitry (e.g., a pressure sensor) adapted to measure theintensity of force incurred by the touch.

The audio module 170 may convert a sound into an electrical signal andvice versa. According to an embodiment, the audio module 170 may obtainthe sound via the input device 150, or output the sound via the soundoutput device 155 or a headphone of an external electronic device (e.g.,an electronic device 102) directly (e.g., wiredly) or wirelessly coupledwith the electronic device 101.

The sensor module 176 may detect an operational state (e.g., power ortemperature) of the electronic device 101 or an environmental state(e.g., a state of a user) external to the electronic device 101, andthen generate an electrical signal or data value corresponding to thedetected state. According to an embodiment, the sensor module 176 mayinclude, for example, a gesture sensor, a gyro sensor, an atmosphericpressure sensor, a magnetic sensor, an acceleration sensor, a gripsensor, a proximity sensor, a color sensor, an infrared (IR) sensor, abiometric sensor, a temperature sensor, a humidity sensor, or anilluminance sensor.

The interface 177 may support one or more specified protocols to be usedfor the electronic device 101 to be coupled with the external electronicdevice (e.g., the electronic device 102) directly (e.g., wiredly) orwirelessly. According to an embodiment, the interface 177 may include,for example, a high definition multimedia interface (HDMI), a universalserial bus (USB) interface, a secure digital (SD) card interface, or anaudio interface.

A connecting terminal 178 may include a connector via which theelectronic device 101 may be physically connected with the externalelectronic device (e.g., the electronic device 102). According to anembodiment, the connecting terminal 178 may include, for example, a HDMIconnector, a USB connector, a SD card connector, or an audio connector(e.g., a headphone connector).

The haptic module 179 may convert an electrical signal into a mechanicalstimulus (e.g., a vibration or a movement) or electrical stimulus whichmay be recognized by a user via his tactile sensation or kinestheticsensation. According to an embodiment, the haptic module 179 mayinclude, for example, a motor, a piezoelectric element, or an electricstimulator.

The camera module 180 may capture a still image or moving images.According to an embodiment, the camera module 180 may include one ormore lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to theelectronic device 101. According to one embodiment, the power managementmodule 188 may be implemented as at least part of, for example, a powermanagement integrated circuit (PMIC).

The battery 189 may supply power to at least one component of theelectronic device 101. According to an embodiment, the battery 189 mayinclude, for example, a primary cell which is not rechargeable, asecondary cell which is rechargeable, or a fuel cell.

The communication module 190 may support establishing a direct (e.g.,wired) communication channel or a wireless communication channel betweenthe electronic device 101 and the external electronic device (e.g., theelectronic device 102, the electronic device 104, or the server 108) andperforming communication via the established communication channel. Thecommunication module 190 may include one or more communicationprocessors that are operable independently from the processor 120 (e.g.,the application processor (AP)) and supports a direct (e.g., wired)communication or a wireless communication. According to an embodiment,the communication module 190 may include a wireless communication module192 (e.g., a cellular communication module, a short-range wirelesscommunication module, or a global navigation satellite system (GNSS)communication module) or a wired communication module 194 (e.g., a localarea network (LAN) communication module or a power line communication(PLC) module). A corresponding one of these communication modules maycommunicate with the external electronic device via the first network198 (e.g., a short-range communication network, such as Bluetooth™,wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA))or the second network 199 (e.g., a long-range communication network,such as a cellular network, the Internet, or a computer network (e.g.,LAN or wide area network (WAN)). These various types of communicationmodules may be implemented as a single component (e.g., a single chip),or may be implemented as multi components (e.g., multi chips) separatefrom each other. The wireless communication module 192 may identify andauthenticate the electronic device 101 in a communication network, suchas the first network 198 or the second network 199, using subscriberinformation (e.g., international mobile subscriber identity (IMSI))stored in the subscriber identification module 196.

The antenna module 197 may transmit or receive a signal or power to orfrom the outside (e.g., the external electronic device) of theelectronic device 101. According to an embodiment, the antenna module197 may include an antenna including a radiating element composed of aconductive material or a conductive pattern formed in or on a substrate(e.g., PCB). According to an embodiment, the antenna module 197 mayinclude a plurality of antennas. In such a case, at least one antennaappropriate for a communication scheme used in the communicationnetwork, such as the first network 198 or the second network 199, may beselected, for example, by the communication module 190 (e.g., thewireless communication module 192) from the plurality of antennas. Thesignal or the power may then be transmitted or received between thecommunication module 190 and the external electronic device via theselected at least one antenna. According to an embodiment, anothercomponent (e.g., a radio frequency integrated circuit (RFIC)) other thanthe radiating element may be additionally formed as part of the antennamodule 197.

At least some of the above-described components may be coupled mutuallyand communicate signals (e.g., commands or data) therebetween via aninter-peripheral communication scheme (e.g., a bus, general purposeinput and output (GPIO), serial peripheral interface (SPI), or mobileindustry processor interface (MIPI)).

According to an embodiment, commands or data may be transmitted orreceived between the electronic device 101 and the external electronicdevice 104 via the server 108 coupled with the second network 199. Eachof the electronic devices 102 and 104 may be a device of a same type as,or a different type, from the electronic device 101. According to anembodiment, all or some of operations to be executed at the electronicdevice 101 may be executed at one or more of the external electronicdevices 102, 104, or 108. For example, if the electronic device 101should perform a function or a service automatically, or in response toa request from a user or another device, the electronic device 101,instead of, or in addition to, executing the function or the service,may request the one or more external electronic devices to perform atleast part of the function or the service. The one or more externalelectronic devices receiving the request may perform the at least partof the function or the service requested, or an additional function oran additional service related to the request, and transfer an outcome ofthe performing to the electronic device 101. The electronic device 101may provide the outcome, with or without further processing of theoutcome, as at least part of a reply to the request. To that end, acloud computing, distributed computing, or client-server computingtechnology may be used, for example.

The electronic device according to various embodiments may be one ofvarious types of electronic devices. The electronic devices may include,for example, a portable communication device (e.g., a smartphone), acomputer device, a portable multimedia device, a portable medicaldevice, a camera, a wearable device, or a home appliance. According toan embodiment of the disclosure, the electronic devices are not limitedto those described above.

It should be appreciated that various embodiments of the presentdisclosure and the terms used therein are not intended to limit thetechnological features set forth herein to particular embodiments andinclude various changes, equivalents, or replacements for acorresponding embodiment. With regard to the description of thedrawings, similar reference numerals may be used to refer to similar orrelated elements. It is to be understood that a singular form of a nouncorresponding to an item may include one or more of the things, unlessthe relevant context clearly indicates otherwise. As used herein, eachof such phrases as “A or B,” “at least one of A and B,” “at least one ofA or B,” “A, B, or C,” “at least one of A, B, and C,” and “at least oneof A, B, or C,” may include any one of, or all possible combinations ofthe items enumerated together in a corresponding one of the phrases. Asused herein, such terms as “1st” and “2nd,” or “first” and “second” maybe used to simply distinguish a corresponding component from another,and does not limit the components in other aspect (e.g., importance ororder). It is to be understood that if an element (e.g., a firstelement) is referred to, with or without the term “operatively” or“communicatively”, as “coupled with,” “coupled to,” “connected with,” or“connected to” another element (e.g., a second element), it means thatthe element may be coupled with the other element directly (e.g.,wiredly), wirelessly, or via a third element.

As used herein, the term “module” may include a unit implemented inhardware, software, or firmware, and may interchangeably be used withother terms, for example, “logic,” “logic block,” “part,” or“circuitry”. A module may be a single integral component, or a minimumunit or part thereof, adapted to perform one or more functions. Forexample, according to an embodiment, the module may be implemented in aform of an application-specific integrated circuit (ASIC).

Various embodiments as set forth herein may be implemented as software(e.g., the program 140) including one or more instructions that arestored in a storage medium (e.g., internal memory 136 or external memory138) that is readable by a machine (e.g., the electronic device 101).For example, a processor(e.g., the processor 120) of the machine (e.g.,the electronic device 101) may invoke at least one of the one or moreinstructions stored in the storage medium, and execute it, with orwithout using one or more other components under the control of theprocessor. This allows the machine to be operated to perform at leastone function according to the at least one instruction invoked. The oneor more instructions may include a code generated by a compiler or acode executable by an interpreter. The machine-readable storage mediummay be provided in the form of a non-transitory storage medium. Wherein,the term “non-transitory” simply means that the storage medium is atangible device, and does not include a signal (e.g., an electromagneticwave), but this term does not differentiate between where data issemi-permanently stored in the storage medium and where the data istemporarily stored in the storage medium.

According to an embodiment, a method according to various embodiments ofthe disclosure may be included and provided in a computer programproduct. The computer program product may be traded as a product betweena seller and a buyer. The computer program product may be distributed inthe form of a machine-readable storage medium (e.g., compact disc readonly memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded)online via an application store (e.g., PlayStore™), or between two userdevices (e.g., smart phones) directly. If distributed online, at leastpart of the computer program product may be temporarily generated or atleast temporarily stored in the machine-readable storage medium, such asmemory of the manufacturer's server, a server of the application store,or a relay server.

According to various embodiments, each component (e.g., a module or aprogram) of the above-described components may include a single entityor multiple entities. According to various embodiments, one or more ofthe above-described components may be omitted, or one or more othercomponents may be added. Alternatively or additionally, a plurality ofcomponents (e.g., modules or programs) may be integrated into a singlecomponent. In such a case, according to various embodiments, theintegrated component may still perform one or more functions of each ofthe plurality of components in the same or similar manner as they areperformed by a corresponding one of the plurality of components beforethe integration. According to various embodiments, operations performedby the module, the program, or another component may be carried outsequentially, in parallel, repeatedly, or heuristically, or one or moreof the operations may be executed in a different order or omitted, orone or more other operations may be added.

FIG. 2 is a block diagram 200 illustrating the power management module188 and the battery 189 according to an embodiment of the presentdisclosure. Referring to FIG. 2, the power management module 188 mayinclude charging circuitry 210, a power adjuster 220, or a power gauge230. The charging circuitry 210 may charge the battery 189 by usingpower supplied from an external power source external to the electronicdevice 101. According to an embodiment, the charging circuitry 210 mayselect a charging scheme (e.g., normal charging or quick charging) basedat least in part on the type of the external power source (e.g., typessuch as power outlet, USB, or wireless charging), the magnitude of powersuppliable from the external power source (e.g., 20 Watt or more),and/or an attribute of the battery 189. The charging circuitry 210 maythen charge the battery 189 using the selected charging scheme. Theexternal power source may be connected with the electronic device 101,for example, directly via the connecting terminal 178 or wirelessly viathe antenna module 197.

The power adjuster 220 may generate a plurality of powers havingdifferent voltage levels or different current levels by adjusting thevoltage level or the current level of the power supplied from theexternal power source or the battery 189. The power adjuster 220 mayadjust the voltage level or the current level of the power supplied fromthe external power source or the battery 189 into a different voltagelevel or current level appropriate for at least one of the componentsincluded in the electronic device 101. According to an embodiment, thepower adjuster 220 may be implemented in the form of a low drop out(LDO) regulator or a switching regulator. The power gauge 230 maymeasure use state information about the battery 189 (e.g., capacity, thenumber of times the battery 189 has been charged or discharged, voltageof the battery 189, temperature of the battery 189, etc.).

The power management module 188 may determine, using, for example, thecharging circuitry 210, the power adjuster 220, or the power gauge 230,charging state information (e.g., lifetime, over voltage, low voltage,over current, over charge, over discharge, overheat, short-circuit, orswelling) related to the charging of the battery 189 based at least inpart on the measured use state information about the battery 189. Thepower management module 188 may determine whether the state of thebattery 189 is normal or abnormal based at least in part on thedetermined charging state information. If the state of the battery 189is determined to abnormal, the power management module 188 may adjustthe charging of the battery 189 (e.g., reduce the charging current orvoltage, or stop the charging). According to an embodiment, at leastsome of the functions of the power management module 188 may beperformed by an external control device (e.g., the processor 120). Theprocessor 120 may include a microprocessor or any suitable type ofprocessing circuitry, such as one or more general-purpose processors(e.g., ARM-based processors), a Digital Signal Processor (DSP), aProgrammable Logic Device (PLD), an Application-Specific IntegratedCircuit (ASIC), a Field-Programmable Gate Array (FPGA), a GraphicalProcessing Unit (GPU), a video card controller, etc. In addition, itwould be recognized that when a general purpose computer accesses codefor implementing the processing shown herein, the execution of the codetransforms the general purpose computer into a special purpose computerfor executing the processing shown herein. Certain of the functions andsteps provided in the Figures may be implemented in hardware, softwareor a combination of both and may be performed in whole or in part withinthe programmed instructions of a computer. No claim element herein is tobe construed under the provisions of 35 U.S.C. § 112(f), unless theelement is expressly recited using the phrase “means for.” In addition,an artisan understands and appreciates that a “processor” or“microprocessor” may be hardware in the claimed disclosure. Under thebroadest reasonable interpretation, the appended claims are statutorysubject matter in compliance with 35 U.S.C. § 101.

The battery 189, according to an embodiment, may include a protectioncircuit module (PCM) 240. The PCM 240 may perform one or more functions,such as a charge cutoff function, to prevent deterioration or damage tothe battery 189. The PCM 240, additionally or alternatively, may beconfigured as at least part of a battery management system (BMS) capableof performing various functions such as cell balancing, measurement ofbattery capacity, counting the number of charges or discharges,measurement of temperature, and measurement of voltage.

According to an embodiment, parts of the charging state information oruse state information regarding the battery 189 may be measured usingcorresponding sensors (e.g., a temperature sensor) of the sensor module176, the power gauge 230, or the power management module 188. Accordingto an embodiment, the corresponding sensors of the sensor module 176 maybe included as part of the PCM 240, or may be disposed near the battery189 as separate devices.

FIG. 3 is a block diagram illustrating a wireless charging environmentaccording to an embodiment of the present disclosure.

Referring to FIG. 3, in one embodiment, a power transmitter 310 (e.g.,the electronic device 102 of FIG. 1) may include a power generationcircuit 311, a control circuit 312, a communication circuit 313, and asensing circuit 314.

In one embodiment, the power generation circuit 311 may include a poweradapter 311 a, a power generation circuit 311 b, and a matching circuit311 c. The power adapter 311 a receives a power input from a powersource and appropriately converts the voltage of the power input. Thepower generation circuit 311 b generates power. The matching circuit 311c adjusts the efficiency between the transmission coil 311L and thereception coil 321L of a power receiver 320.

In one embodiment, the control circuit 312 performs the overall controlof the power transmitter 310 and may generate and deliver variousmessages required for wireless power transfer to the communicationcircuit 313. In one embodiment, the control circuit 312 may calculatethe amount of power to be transmitted to the power receiver 320 (e.g.,the electronic device 101 of FIG. 1), based on information received fromthe communication circuit 313. In one embodiment, the control circuit312 may control the power generation circuit 311 to transmit thecalculated amount of power to the power receiver 320 through thetransmission coil 311L.

In one embodiment, the communication circuit 313 may include at leastone of a first communication circuit 313 a and a second communicationcircuit 313 b. The first communication circuit 313 a may communicatewith a first communication circuit 323 a of the power receiver 320 byusing the same frequency as the frequency used for power transferbetween the transmission coil 311L and the reception coil 321L (e.g.,in-band communication). In another embodiment, the second communicationcircuit 313 b may communicate with a second communication circuit 323 bof the power receiver 320 by using a frequency different from thefrequency used for power transfer between the transmission coil 311L andthe reception coil 321L (e.g., out-band communication). For example, thesecond communication circuit 313 b may acquire information (e.g.,V_(rec) information (e.g., received voltage), I_(out) information (e.g.,output current), various packets, messages, etc.) associated with thecharging state from the second communication circuit 323 b by using oneof various short-range communication techniques such as Bluetooth, BLE,Wi-Fi, and NFC.

In one embodiment, the sensing circuit 314 may measure the state of thepower transmitter 310.

In one embodiment, the sensing circuit 314 may include a first sensingcircuit for sensing the temperature, motion state, etc. of the powertransmitter 310.

In one embodiment, the sensing circuit 314 may include a second sensingcircuit capable of measuring a signal in the power generation circuit311. Specifically, the second sensing circuit may measure signals in oneor more of the transmission coil 311L, the matching circuit 311 c, orthe power generation circuit 311 b. For example, the second sensingcircuit may measure a signal at the front end of the transmission coil.

In one embodiment, the power receiver 320 may include a power receptioncircuit 321, a control circuit 322 (e.g., the processor 120 of FIG. 1),a communication circuit 323 (e.g., the communication module 190 of FIG.1), at least one sensor 324 (e.g., the sensor module 176 of FIG. 1), anda display 325 (e.g., the display device 160 of FIG. 1). In the powerreceiver 320, some components corresponding to those of the powertransmitter 310 may be omitted below.

In one embodiment, the power reception circuit 321 may include areception coil 321L for wirelessly receiving power from the powertransmitter 310, a matching circuit 321 a, a rectifying circuit 321 bfor rectifying received AC power to DC power, an adjusting circuit 321 cfor adjusting the charging voltage, a switch circuit 321 d, and abattery 321 e.

In one embodiment, the control circuit 322 performs the overall controlof the power receiver 320 and may generate and deliver various messagesrequired for wireless power transfer to the communication circuit 323.

In one embodiment, the communication circuit 323 may include at leastone of a first communication circuit 323 a and a second communicationcircuit 323 b. The first communication circuit 323 a may communicatewith the power transmitter 310 via the reception coil 321L. The secondcommunication circuit 323 b may communicate with the power transmitter310 by using one of various short-range communication techniques such asBluetooth, BLE, Wi-Fi, and NFC. For example, the communication circuit323 may receive data regarding the reason charging is stopping from thepower transmitter 310.

In addition, the power receiver 320 may further include the at least onesensor 324 such as a current/voltage sensor, a temperature sensor, anilluminance sensor, or a sound sensor, and the display 325.

FIG. 4 is a flow diagram illustrating a wireless charging process and awireless charging stop process between an electronic device and anexternal electronic device according to an embodiment of the presentdisclosure.

Referring to FIG. 4, in an embodiment, the power transmitter 310 (e.g.,a wireless charger, a wireless charging pad, an external electronicdevice, etc.) may transmit power wirelessly to the power receiver 320(e.g., a mobile terminal, a smart phone, an electronic device, etc.).The power transmitter 310 may control the power transfer, based oninformation received from the power receiver 320 and/or informationcalculated and acquired autonomously. For example, wireless chargingprocess performed between the power transmitter 310 and the powerreceiver 320 may include a ping phase 410, an identification andconfiguration phase 420, and a power transfer phase 430.

According to an embodiment, at operation 411, the power transmitter 310may transmit ping data to the power receiver 320 in order to checkwhether wireless power transfer is available. At operation 413, thepower receiver 320 may transmit data regarding the signal strength ofthe ping data to the power transmitter 310 in response to receiving theping data. According to an embodiment, at operation 413, the powerreceiver 320 may transmit a response signal corresponding to thereception of the ping data to the power transmitter 310.

According to an embodiment, at operation 421, the power receiver 320 maytransmit identification information to the power transmitter 310.Further, at operation 423, the power receiver 320 may transmitconfiguration information to the power transmitter 310. Theidentification and configuration phase 420 is a process of preparingwireless charging between the power transmitter 310 and the powerreceiver 320, and thereafter the wireless charging is performed.Although not shown in FIG. 4, in the identification and configurationphase 420, the power transmitter 310 may also transmit identificationinformation to the power receiver 320.

According to an embodiment, in the power transfer phase 430, the powerreceiver 320 may receive power wirelessly from the power transmitter 310and perform wireless charging. During the wireless charging process, thepower receiver 320 may transmit at least one kind of data for wirelesscharging control to the power transmitter 310. For example, the powerreceiver 320 may transmit, to the power transmitter 310, control errorpacket (CEP) data 431, 433, 435, etc. to control power being transmittedduring charging. In addition, the power receiver 320 may transmit, tothe power transmitter 310, received power packet (RPP) data 432, 434,etc. for indicating received power information during charging. Forreference, the above data 431 to 435 are merely denoted by names ofrepresentative packets or data and may further contain additional data.

According to an embodiment, in the power transfer phase 430, the powertransmitter 310 may check the wireless charging state while transmittingpower wirelessly. For example, using the first sensing circuit in thesensing circuit 314, the power transmitter 310 may check the temperatureof the power transmitter 310 during wireless charging. Also, using thesecond sensing circuit in the sensing circuit 314, the power transmitter310 may measure various signal in the transmission coil 311L, thematching circuit 311 c, and/or the power generation circuit 311 b, andthereby check the state of the power transmitter 310.

According to an embodiment, based on at least one of the data receivedfrom the power receiver 320 or the wireless charging state of the powertransmitter 310, the power transmitter 310 may determine whether areason to stop wireless charging has arisen. When such a reason arises,the power transmitter 310 may transmit data regarding the reason to thepower receiver 320 at operation 436. Thereafter, at operation 437, thepower transmitter 310 may receive, from the power receiver 320, anacknowledgment (ACK) that indicates the reception of the data regardingthe reason. Specific examples of the reason to stop wireless chargingwill be described below with reference to FIG. 6. The sequence ofoperations shown in FIG. 4 is exemplary only, and for example the powertransmitter 310 may perform the transmission of the data regarding thereason to stop wireless charging at any time before or after receivingthe CEP data and/or the RPP data.

According to an embodiment, after a certain time period elapses from thereception of the ACK, the power transmitter 310 may stop the wirelesspower transfer. If the power transmitter 310 stops the wireless powertransfer immediately after receiving the ACK from the power receiver320, the power receiver 320 may not have sufficient time to prepare forthe stop of wireless charging, which may cause charging instability.

FIG. 5 is a diagram illustrating a data partition structure forindicating a reason for stopping wireless charging according to anembodiment of the present disclosure.

According to an embodiment, the data partition structure of the powertransmitter (PTX) 310, which may be a packet structure for the reason tostop wireless charging may be shown in FIG. 5. The size of the packetshown in FIG. 5 is only exemplary and the present disclosure is not solimited.

According to an embodiment, the packet structure for the reason to stopwireless charging may include a command 510, a value 520, and a checksum530. The command 510 may serve as the header of the packet. For example,the command 510 may be set to ‘0x05’. The value 520 may contain thesubstantive data regarding the reason to stop wireless charging. Thechecksum 530 may be used to verify whether the packet is correctlytransmitted.

According to an embodiment, the power transmitter 310 may transmit dataregarding the reason for stopping wireless charging through frequencyshift keying (FSK) of the power transmitted to the power receiver 320.That is, while supplying power to the power receiver 320, the powertransmitter 310 may transmit data regarding the reason for stoppingwireless charging to the power receiver 320 via in-band communicationusing frequency shift keying. Accordingly, the power transmitter 310does not need to use out-band communication involving a separatecommunication module in order to transmit the data regarding the reasonto the power receiver 320.

But according to an alternative embodiment, the power transmitter 310may also transmit data regarding the reason for stopping wirelesscharging to the power receiver 320 using out-band communication.

According to an embodiment, after receiving the CEP data, the RPP data,or other data on the charging state from the power receiver 320, thepower transmitter 310 may transmit the data regarding the reason forstopping wireless charging to the power receiver 320. In this case,frequency variation for the frequency shift keying may be at least 1% ofthe transmission frequency. When an FSK packet is received from thepower transmitter 310, the power receiver 320 may send, in response, anACK packet to the power transmitter 310.

FIG. 6 is a diagram illustrating data representing the reason forstopping wireless charging according to an embodiment of the presentdisclosure.

According to an embodiment, FIG. 6 shows exemplary values (e.g., 520 ofFIG. 5) in the packet used for transmission of the reason for stoppingwireless charging and corresponding reasons. For example, when the powertransmitter 310 has an overvoltage or overcurrent, or is overheating,the power transmitter 310 may recognize this as a reason to stopwireless charging. In another scenario, when foreign object is detected(FOD) between the power transmitters 310 and the power receiver 320, thepower transmitter 310 may recognize the FOD as a reason to stop wirelesscharging stop. Thus, before stopping the power transfer, the powertransmitter 310 may insert the value as shown in FIG. 6 in the packetused for transmission of the reason for stopping wireless charging andthen transmit the packet to the power receiver 320.

According to an embodiment, when the value contained in the packetindicates ‘0x12’, this means that the power transmitter 310 isoverheated. For example, when a temperature greater than a predeterminedtemperature is detected through the sensing circuit 314 of the powertransmitter 310, the power transmitter 310 may recognize this as itbeing overheated. Therefore, the power transmitter 310 may transmit thepacket having the value of 0x12 to the power receiver 320 and, after anelapse of a predetermined time, stop the wireless power transfer.

According to an embodiment, when the value contained in the packetindicates ‘0x13’, this means that the power transmitter 310 has anovercurrent. For example, when a current greater than a predeterminedcurrent is detected through the sensing circuit 314 of the powertransmitter 310, the power transmitter 310 may recognize this as ithaving an overcurrent. Therefore, the power transmitter 310 may transmitthe packet having the value of 0x13 to the power receiver 320 and, afteran elapse of a predetermined time, stop the wireless power transfer.

According to an embodiment, when the value contained in the packetindicates ‘0x14’, this means that the power receiver 320 is located in azone incapable of wireless charging (i.e., a dark zone). For example,when the power receiver 320 is located in a peripheral region of thepower transmitter 310, and not in the central region, intermittentfailure in wireless charging may occur repeatedly or the powertransmitter 310 may not be capable of generating the power required forwireless charging when the power receiver 320 is in such a location.

According to an embodiment, based on one or more types of informationreceived from the power receiver 320, the power transmitter 310 mayrecognize that the power receiver 320 is located in the dark zone. Forexample, the information may include signal strength packet (SSP)information that indicates the degree of coupling between the coils 311Land 321L prior to wireless charging. In another example, the informationmay include received power packet (RPP) information or control errorpacket (CEP) information received from the power receiver 320. In stillanother example, the information may be frequency information for thecurrent power transfer. When the power transmitter 310 recognizes thatthe power receiver 320 is located in the dark zone, the powertransmitter 310 may transmit the packet having the value of 0x14 to thepower receiver 320 and, after an elapse of a predetermined time, stopthe wireless power transfer.

According to an embodiment, when the value contained in the packet usedfor transmission of the reason to stop wireless charging indicates oneof ‘0x20’ to ‘0x27’, this means foreign object is detected (FOD) betweenthe power transmitters 310 and the power receiver 320. In oneembodiment, during the wireless charging process, the power receiver 320may periodically transmit information regarding the amount of currentlyreceived power to the power transmitter 310 in the form of a receivedpower packet (RPP). Then, the power transmitter 310 may compare theamount of received power received from the power receiver 320 with theamount of transmitted power transmitted by the power transmitter 310 andthereby identify the loss of power. If the power loss is greater than apredetermined level, the power transmitter 310 may determine that thereis a foreign object between the power transmitter 310 and the powerreceiver 320.

According to an embodiment, different intervals of power loss maycorrespond to different values (0x20 to 0x27) in the packet, as shown inFIG. 6. The different values shown in FIG. 6 may be utilized for variouspurposes. For example, a smaller power loss interval (0x20) may beapplicable to devices using less power such as a smartwatch, and alarger power loss interval (0x23) may be applicable to device using morepower such as a smart phone.

FIG. 7 is a diagram illustrating a method for outputting a reason tostop wireless charging an electronic device according to an embodimentof the present disclosure.

According to an embodiment, as shown in FIG. 7, wireless charging may beperformed when the power receiver 320 is in contact with or in proximityto the power transmitter 310. The display 325 of the power receiver 320may output an image, text, etc. associated with the wireless charging.In particular, the power receiver 320 may receive a packet regarding areason to stop wireless charging from the power transmitter 310 and,based on a value included in the received packet, may recognize thereason to stop wireless charging.

According to an embodiment, the power receiver 320 may output the reasonto stop wireless charging corresponding to the value through the display325 or the sound output device 155. For example, when the reason forstopping wireless charging is that a foreign object is detected, thepower receiver 320 may provide the user with the following information:“Charging has been stopped. Please check whether there is foreign matterbetween your phone and the wireless charger.” In another example, if thereason for stopping wireless charging is because the power receiver 320is in the dark zone, the power receiver 320 may provide the user withthe following information: “Charging has been stopped. Please check thelocation of your phone. (Please move your phone to the center of thewireless charger)”

FIG. 8 is a flow diagram illustrating a method for transmitting a reasonto stop charging and stopping power transfer at an external electronicdevice according to an embodiment of the present disclosure.

According to an embodiment, at operation 810, the external electronicdevice 102 (e.g., the power transmitter 310) may transmit powerwirelessly to the electronic device 101 (e.g., the power receiver 320).

According to an embodiment, at operation 820, the external electronicdevice 102 may recognize that a reason to stop charging has arisen. Thevarious reasons to stop charging are described earlier with reference toFIG. 6.

According to an embodiment, at operation 830, the external electronicdevice 102 may determine whether the reason that has arisen is apredefined reason. Specifically, the external electronic device 102 maydetermine whether the recognized reason to stop wireless charging is apredefined reason. For example, the external electronic device 102 maydetermine whether the recognized reason to stop wireless chargingcorresponds to one of the reasons shown in FIG. 6.

According to an embodiment, when the reason that has arisen is apredefined reason, the external electronic device 102 may transmit thereason to the electronic device 101 at operation 840. Specifically, theexternal electronic device 102 may insert a particular value 520corresponding to the reason in a packet used for transmission of thereason to stop wireless charging and then transmit the packet to theelectronic device 101.

According to an embodiment, when the reason is not a predefined reason,the external electronic device 102 may stop power transfer at operation860. For example, in this case, the external electronic device 102 mayimmediately stop the power transfer without an elapse of a predeterminedtime period.

According to an embodiment, at operation 850, the external electronicdevice 102 may receive ACK data from the electronic device 101 withrespect to the reason.

According to an embodiment, at operation 860, the external electronicdevice 102 may stop the power transfer after an elapse of apredetermined time period from the transmission of the reason to theelectronic device 101 or from the reception of the ACK data from theelectronic device 101. That is, the external electronic device 102 maydelay a certain amount of time (e.g., about one second) before stoppingthe power transfer, so that the electronic device 101 has time toprepare for the end of the power transfer (e.g., deliver the reason tostop wireless charging to the AP such as the control circuit 322).

FIG. 9 is a flow diagram illustrating a method for receiving a reason tostop wireless charging and stopping wireless charging at an electronicdevice according to an embodiment of the present disclosure.

According to an embodiment, at operation 910, the electronic device 101(e.g., the power receiver 320) may receive a reason to stop chargingfrom the external electronic device 102 (e.g., the power transmitter310) during wireless charging. The reason to stop charging is describedearlier with reference to FIG. 6.

According to an embodiment, at operation 920, the electronic device 101may transmit ACK data to the external electronic device 102 in responseto the reception of the reason.

According to an embodiment, at operation 930, the electronic device 101may determine whether the reason is a predefined reason. Specifically,the electronic device 101 may determine whether the recognized reason tostop wireless charging is a predefined reason. For example, theelectronic device 101 may determine whether the reason received from theexternal electronic device 102 at the operation 910 corresponds to oneof the reasons shown in FIG. 6.

According to an embodiment, when the received reason is a predefinedreason, the electronic device 101 may provide the reason to the user ofthe electronic device 101 at operation 940. For example, the electronicdevice 101 may provide the user with the reason using the display device160 or the sound output device 155 so that the user can be aware of whywireless charging has stopped. In addition, the electronic device 101may perform a function of guiding the user so that the same problem doesnot recur in the future. In addition, the electronic device 101 mayanalyze the reason to stop wireless charging to improve the electronicdevice 101 or the external electronic device 102 for smoother wirelesscharging.

According to an embodiment, when the received reason is not a predefinedreason, or after the reason is provided to the user, the electronicdevice 101 may stop the power transfer at operation 950.

According to an embodiment, an electronic device may comprise a display;a power reception circuit; and a processor configured to performwireless charging by receiving power wirelessly from an externalelectronic device through the power reception circuit, receive data onone or more reasons to stop wireless charging from the externalelectronic device during the wireless charging, transmit acknowledge(ACK) data to the external electronic device in response to receivingthe data on the one or more reasons to stop wireless charging, anddisplay, through the display, at least one reason to stop wirelesscharging included in the data on the one or more reasons to stopwireless charging.

The processor may be further configured to use a first frequency for thewireless charging, and use a same frequency as the first frequency forreception of the data on the one or more reasons to stop wirelesscharging.

The processor may be further configured to stop the wireless chargingafter elapse of a predetermined time period from transmission of the ACKdata to the external electronic device.

The processor may be further configured to transmit, to the externalelectronic device during the wireless charging, at least one of receivedpower packet (RPP) data for indicating the power received from theexternal electronic device and control error packet (CEP) data forcontrolling the power received from the external electronic device.

The one or more reasons to stop wireless charging may include at leastone of overheating of the external electronic device, overcurrent of theexternal electronic device, foreign object detection between theexternal electronic device and the electronic device, and a state inwhich the electronic device is located in a dark zone where the wirelesscharging at least intermittently fails.

The foreign object may be detected when a power loss identified bycomparing received power packet (RPP) data for indicating the powerreceived from the external electronic device with power transmitted bythe external electronic device is greater than a predetermined level.

The state in which the electronic device is located in the dark zone maybe determined based on at least one of signal strength packet (SSP) dataindicating a degree of coupling between coils equipped respectively inthe electronic device and the external electronic device, frequency dataof the wireless charging, received power packet (RPP) data forindicating the power received from the external electronic device, andcontrol error packet (CEP) data for controlling the power received fromthe external electronic device.

The electronic device may further comprise a sound output device,wherein the processor is further configured to output the at least onereason to stop wireless charging through the sound output device.

The data on the one or more reasons to stop wireless charging may be inthe form of a packet which includes a value indicating the at least onereason to stop wireless charging.

According to an embodiment, a method performed by an electronic devicemay comprise performing wireless charging by receiving power wirelesslyfrom an external electronic device through a power reception circuit;receiving data on one or more reasons to stop wireless charging from theexternal electronic device during the wireless charging; transmittingacknowledge (ACK) data to the external electronic device in response tothe receiving the data on the one or more reasons to stop wirelesscharging; and displaying, through a display, at least one reason to stopwireless charging included in the data on the one or more reasons tostop wireless charging.

The method may further comprise stopping the wireless charging afterelapse of a predetermined time period from the transmitting of the ACKdata to the external electronic device.

The method may further comprise transmitting, to the external electronicdevice during the wireless charging, at least one of received powerpacket (RPP) data for indicating the power received from the externalelectronic device and control error packet (CEP) data for controllingthe power received from the external electronic device.

In the method, the one or more reasons to stop wireless charging mayinclude at least one of overheating of the external electronic device,overcurrent of the external electronic device, foreign object detectionbetween the external electronic device and the electronic device, and astate in which the electronic device is located in a dark zone where thewireless charging at least intermittently fails.

In the method, the state in which the electronic device is located inthe dark zone may be determined based on at least one of signal strengthpacket (SSP) data indicating a degree of coupling between coils equippedrespectively in the electronic device and the external electronicdevice, frequency data of the wireless charging, received power packet(RPP) data for indicating the power received from the externalelectronic device, and control error packet (CEP) data for controllingthe power received from the external electronic device.

In the method, the data on the one or more reasons to stop wirelesscharging may be in the form of a packet which includes a valueindicating the at least one reason to stop wireless charging.

According to an embodiment, an electronic device may comprise a powertransmission circuit; and a processor configured to perform wirelesspower transfer by transmitting power wirelessly to an externalelectronic device through the power transmission circuit, detect areason to stop wireless charging during the wireless power transfer,transmit data on the reason to stop wireless charging to the externalelectronic device, and stop the wireless power transfer after elapse ofa first predetermined time period from the transmitting of the data onthe reason to stop wireless charging.

The processor may be further configured to receive acknowledge (ACK)data from the external electronic device, the ACK data indicating thatthe external electronic device has received the data on the reason tostop wireless charging, and stop the wireless power transfer afterelapse of a second predetermined time period from the receiving of theACK data.

The processor may be further configured to use a first frequency for thewireless power transfer, and use a same frequency as the first frequencyfor transmission of the data on the reason to stop wireless charging.

The processor may be further configured to acquire data on powerreceived by the external electronic device from the external electronicdevice, and recognize foreign object detection as the reason to stopwireless charging, based on comparing the data on the power received bythe external electronic device with the power transmitted by theelectronic device.

The electronic device may further comprise a sensing circuit, whereinthe processor is further configured to recognize overheating as thereason to stop wireless charging when a temperature sensed through afirst sensor of the sensing circuit is greater than a predeterminedtemperature, and recognize overcurrent as the reason to stop wirelesscharging when a current sensed through a second sensor of the sensingcircuit is greater than a predetermined current.

Certain of the above-described embodiments of the present disclosure canbe implemented in hardware, firmware or via the execution of software orcomputer code that can be stored in a recording medium such as a CD ROM,a Digital Versatile Disc (DVD), a magnetic tape, a RAM, a floppy disk, ahard disk, or a magneto-optical disk or computer code downloaded over anetwork originally stored on a remote recording medium or anon-transitory machine readable medium and to be stored on a localrecording medium, so that the methods described herein can be renderedvia such software that is stored on the recording medium using a generalpurpose computer, or a special processor or in programmable or dedicatedhardware, such as an ASIC or FPGA. As would be understood in the art,the computer, the processor, microprocessor controller or theprogrammable hardware include memory components, e.g., RAM, ROM, Flash,etc. that may store or receive software or computer code that whenaccessed and executed by the computer, processor or hardware implementthe processing methods described herein.

While the present disclosure has been particularly shown and describedwith reference to exemplary embodiments thereof, it is clearlyunderstood that the same is by way of illustration and example only andis not to be taken in conjunction with the present disclosure. It willbe understood by those skilled in the art that various changes in formand details may be made therein without departing from the subjectmatter and scope of the present disclosure.

1. An electronic device comprising: a display; a power receptioncircuit; and a processor configured to: perform wireless charging byreceiving power wirelessly from an external electronic device throughthe power reception circuit, alternatingly transmit, to the externalelectronic device during the wireless charging, control error packet(CEP) data for controlling the power received from the externalelectronic device and received power packet (RPP) data for indicatingthe power received from the external electronic device, receive data onone or more reasons to stop wireless charging from the externalelectronic device during the wireless charging, and a plurality ofsecond values indicating different intervals of power loss caused by aforeign object between the external electronic device and the electronicdevice.
 2. The electronic device of claim 1, wherein the processor isfurther configured to: use a first frequency for the wireless charging,and use a same frequency as the first frequency for reception of thedata on the one or more reasons to stop wireless charging.
 3. Theelectronic device of claim 1, wherein the processor is furtherconfigured to: transmit acknowledge (ACK) data to the externalelectronic device in response to receiving the data on the one or morereasons to stop wireless charging, and stop the wireless charging afterelapse of a predetermined time period from transmission of the ACK datato the external electronic device.
 4. The electronic device of claim 1,wherein the one or more reasons to stop wireless charging includes atleast one of overheating of the external electronic device, overcurrentof the external electronic device, foreign object detection between theexternal electronic device and the electronic device, and the state inwhich the electronic device is located in the dark zone.
 5. Theelectronic device of claim 4, wherein the foreign object is detectedwhen a power loss identified by comparing the received power packet(RPP) data for indicating the power received from the externalelectronic device with power transmitted by the external electronicdevice is greater than a predetermined level.
 6. The electronic deviceof claim 4, wherein the state in which the electronic device is locatedin the dark zone is determined based on at least one of signal strengthpacket (SSP) data indicating a degree of coupling between coils equippedrespectively in the electronic device and the external electronicdevice, frequency data of the wireless charging, the received powerpacket (RPP) data for indicating the power received from the externalelectronic device, and the control error packet (CEP) data forcontrolling the power received from the external electronic device. 7.The electronic device of claim 1, further comprising: a sound outputdevice, wherein the processor is further configured to output the atleast one reason to stop wireless charging through the sound outputdevice.
 8. A method performed by an electronic device, the methodcomprising: performing wireless charging by receiving power wirelesslyfrom an external electronic device through a power reception circuit;alternatingly transmitting, to the external electronic device during thewireless charging, control error packet (CEP) data for controlling thepower received from the external electronic device and received powerpacket (RPP) data for indicating the power received from the externalelectronic device; receiving data on one or more reasons to stopwireless charging from the external electronic device during thewireless charging; and a plurality of second values indicating differentintervals of power loss caused by a foreign object between the externalelectronic device and the electronic device.
 9. The method of claim 8,further comprising: transmitting acknowledge (ACK) data to the externalelectronic device in response to the receiving the data on the one ormore reasons to stop wireless charging; and stopping the wirelesscharging after elapse of a predetermined time period from thetransmitting of the ACK data to the external electronic device.
 10. Themethod of claim 8, wherein the one or more reasons to stop wirelesscharging includes at least one of overheating of the external electronicdevice, overcurrent of the external electronic device, foreign objectdetection between the external electronic device and the electronicdevice, and the state in which the electronic device is located in thedark zone.
 11. The method of claim 8, wherein the state in which theelectronic device is located in the dark zone is determined based on atleast one of signal strength packet (SSP) data indicating a degree ofcoupling between coils equipped respectively in the electronic deviceand the external electronic device, frequency data of the wirelesscharging, the received power packet (RPP) data for indicating the powerreceived from the external electronic device, and the control errorpacket (CEP) data for controlling the power received from the externalelectronic device.
 12. An electronic device comprising: a powertransmission circuit; and a processor configured to: perform wirelesspower transfer by transmitting power wirelessly to an externalelectronic device through the power transmission circuit, alternatinglyreceive, from the external electronic device during the wireless powertransfer, control error packet (CEP) data for controlling the powerreceived by the external electronic device and received power packet(RPP) data for indicating the power received by the external electronicdevice, detect a reason to stop wireless charging during the wirelesspower transfer, transmit data on the reason to stop wireless charging tothe external electronic device, and a plurality of second valuesindicating different intervals of power loss caused by a foreign objectbetween the external electronic device and the electronic device. 13.The electronic device of claim 12, wherein the processor is furtherconfigured to: receive acknowledge (ACK) data from the externalelectronic device, the ACK data indicating that the external electronicdevice has received the data on the reason to stop wireless charging,and stop the wireless power transfer after elapse of a secondpredetermined time period from the receiving of the ACK data.
 14. Theelectronic device of claim 12, wherein the processor is furtherconfigured to: use a first frequency for the wireless power transfer,and use a same frequency as the first frequency for transmission of thedata on the reason to stop wireless charging.
 15. The electronic deviceof claim 12, wherein the processor is further configured to: recognizeforeign object detection as the reason to stop wireless charging, basedon comparing the received power packet (RPP) data for indicating thepower received by the external electronic device with the powertransmitted by the electronic device.
 16. The electronic device of claim12, further comprising: a sensing circuit, wherein the processor isfurther configured to: recognize overheating as the reason to stopwireless charging when a temperature sensed through a first sensor ofthe sensing circuit is greater than a predetermined temperature, andrecognize overcurrent as the reason to stop wireless charging when acurrent sensed through a second sensor of the sensing circuit is greaterthan a predetermined current.
 17. The electronic device of claim 1,wherein the data on the one or more reasons to stop wireless charging isin a form of a packet that includes: a first value indicating a state inwhich the electronic device is located in a dark zone where the wirelesscharging at least intermittently fails; or a plurality of second valuesindicating different intervals of power loss caused by a foreign objectbetween the external electronic device and the electronic device. 18.The method of claim 9, wherein the data on the one or more reasons tostop wireless charging is in a form of a packet that includes: a firstvalue indicating a state in which the electronic device is located in adark zone where the wireless charging at least intermittently fails; ora plurality of second values indicating different intervals of powerloss caused by a foreign object between the external electronic deviceand the electronic device.
 19. The electronic device of claim 14,wherein the data on the one or more reasons to stop wireless charging isin a form of a packet that includes: a first value indicating a state inwhich the electronic device is located in a dark zone where the wirelesscharging at least intermittently fails; or a plurality of second valuesindicating different intervals of power loss caused by a foreign objectbetween the external electronic device and the electronic device.